<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <video controls id="app">
        <source src="3.mp4" type="video/mp4"/>
    </video>
    <div>
        <button id="play">play</button>
        <button id="stop">stop</button>
    </div>
    <script src="jq.js"></script>
    <script>
        $('#play').click(function(){
            $('#app').get(0).play()
        })
        $('#stop').click(function(){
            $('#app').get(0).pause()
        })
    </script>
</body>
</html>